Automatic fsre-extinguisher



' (NoModeL) E. H. ASHCROFT.

AUTOMATIG FIRE EXTINGUISHER. No. 324,209. Patented Aug. 11, I885WITNESSES- UNITED STATES PATENT OFFICE.

EDWARD H. ASHCROFT, OF LYNN, MASSACHUSETTS.

AUTOMATIC FQ'RE-EXTINGUISHER.

EPECIE'ICATION forming part of Letters Patent No. 324,209, dated August11, 1885.

Application filed June 30, 1884. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD H. ASHCROFT, of Lynn, in the county of Essexand State of Massachusetts, have invented certain new and usefulImprovements in Automatic Fire-Extinguishers, of which the following isa specification.

The object of my invention is to so arrange the parts in an automaticfire extinguisher that the valve will be readily adjusted to its seatwith just the pressure required to keep it tight, and to be held in thisposition by a lever and an outside adjustable link, the valveholdingmechanism having some one of its parts made of fusible metal, thefusible part being so arranged that upon its being melted thevalve-holding device will become inoperative and allow the valve toopen. I attain these objects by the mechanism illustrated in theaccompanying drawings.

In Figure 1, A represents the pipe through which the supply of water,steam, or gas is to flow for extinguishing the fire.

V is a valve provided with wing-guides a, as indicated by dotted lines,(see Fig. 2,) and a valvestem V.

A, Figs. 1 and 2, is a coupling-piece,which serves to connect thesupply-pipe A'with any desirable delivery device. Said delivery devicemay be attached to the upper end of the coupling A by screw-threads, orby any other means.

B is a lever passing through an opening, A in the coupling-piece A.- Thefixed end .of the lever Bpasses into an opening, B, Fig. 1, into whichit fits so loosely as to allow its outer end to swing up and down. Thislever B is provided at B with a socket which receives the upper end ofthe valve-stem V.

p D M D form a link, theupper end of which is pivoted at the outer endof the leverB at b, Fig. 1. The lower end of this link passes through anarm, C, which projects from the supply-pipe A, and is held in positionby a thumb-nut, E.

The parts D and D of the link are provided with collars, respectively, Hand H, about which a fusible block, M, is cast, thus making a singlelink, one portion of which is fusible at a moderate temperature200Fahrenheit, for instance.

If we consider the valve-stem V, the lever B, link D M D, and thumb-nutE as a single cinematic chain, it will readily be perceived that it willmake no difference in the principle of my invention as to which of theseveral parts shall be made fusible, as the yielding of one partreleases all the rest and leaves the valve V free to open.

I claim as my invention The combination,with the coupling A, providedwith the openings A and B, and the pipe A, having the lateral arm C, ofthe valve V, having wing-guides a a and valve-stem V, the lever B,having a socket for the reception of said valve-stem, the link formed ofthe part D, secured to the lever B, the part D passing through arm C,said parts being provided with the collars H H, the part M, of fusiblematerial, and the nut E, for holding the parts normally in position,substantially as described.

In testimony that .I claim the foregoing as my own I affix my. signaturein presence of two witnesses.

EDWARD H. ASHCROFT.

Witnesses:

J AMES B. SILsBEE, CHARLES LEIGI-ITON.

